Extension of Flutter Margin Evaluation for Discrete-Time Systems
The stability margin for flutter is conventionally evaluated by the damping of the critical mode. For an explosive type of flutter, however, the damping is not appropriate to predict the flutter boundary because it changes abruptly toward zero near the critical flow speed. Authors introduced an alternative parameter, the flutter margin for discrete-time systems (FMDS), and overcame the defect of the damping method. Since the FMDS is defined only for a two-mode system, a new flutter prediction parameter applicable to a three-mode system is proposed in this paper. The analysis using a two-dimensional wing model shows that the parameter has a suitable property for the flutter prediction. And numerical studies show that the estimate of the parameter can be done accurately for stationary and nonstationary data, so that the accurate and reliable flutter prediction can be done by using the proposed parameter.
aeroelasticity flutter prediction flutter margin flight testing Jury’s stability test,ARMA model time series analysis recursive identification
Hiroshi Torii
Department of Business Management, Meijo University 1-501 Shiogamaguchi, Tempaku, Nagoya, 468-8502 Japan
国际会议
2011年亚太航空航天技术学术会议(APISAT 2011)
澳大利亚
英文
1-10
2011-02-28（万方平台首次上网日期，不代表论文的发表时间）